(Scotty) MacVicar (November 20, 1943 – September 30, 1991) was an American physicist and educator.
In addition to serving as MIT's Dean of Undergraduate Education (1985–1990), MacVicar is credited with founding the now widely emulated Undergraduate Research Opportunities Program (UROP) in 1969.
MacVicar received her undergraduate and graduate degrees at MIT and joined the faculty, giving her the rare distinction of being a "MIT lifer."